Home / 43,428.72-65,143.74-13,871.40

Finding the Fourth Proportional to 43,428.72, 65,143.74 and 13,871.40

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Solution

The fourth proportional to 43,428.72, 65,143.74 and 13,871.40 is: 20,807.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,428.72 : 65,143.74 = 13,871.40 : x
  2. Step 2: Convert to fraction form
    43,428.72/65,143.74 = 13,871.40/x
  3. Step 3: Cross multiply
    43,428.72x = 65,143.74 × 13,871.40
  4. Step 4: Simplify right side
    43,428.72x = 903,634,875.04
  5. Step 5: Solve for x
    x = 903,634,875.04/43,428.72
  6. Step 6: Final answer
    x = 20,807.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.